The Supreme Court will weigh in on two cases regarding the purpose and meaning of marriage this week, and a new document, the Manhattan Declaration, is working toward the sanctity of marriage despite the results.

Eric Teetsel, executive director of the Manhattan Declaration, is joining together Orthodox, Catholic and evangelical Christians to work together and express what they agree is biblically correct and just.

So far more than 500,000 Americans have signed the Manhattan Declaration, "affirming marriage as a union between one man and one woman, the beginning of family and the foundation of society," said Teetsel in a statement to Christian Newswire.

"Should the Supreme Court affirm the meaning and purpose of marriage, we will breathe a sigh of relief. But we won't be satisfied. If the Supreme Court rejects the time-honored purpose of marriage, it will be because the court -- like many of our friends, neighbors and colleagues -- has lost the meaning of marriage and its civic importance," he continued.

Teetsel believes if the Supreme Court rules in favor of same-sex marriage, it will be a failure by believers to make known true moral authority.

"It took generations to erode marriage and family, with disastrous consequences. Restoration may take just as long," he says.

The Manhattan Declaration is not the only coming together of the Christian denominations on the subject. The Marriage Solidarity Statement is taking a similar approach and hopes to rally believers together to pray for the state of the country and to keep marriage pure and holy.

"No matter this week's rulings, we will rededicate ourselves to renewing in American culture the profound beauty, mystery and holiness of faithful marriage. We will be patient in the light of any setbacks. And, in the end, we will succeed -- if we do not give up," Teetsel said in closing in his statement.